If my car usually runs at 180*, is it a 160 or 180 thermostat in there?

 

It uses a 180 degree stat as stock.

 

I'm running the 160 thermostat and my car usually runs at 180F.

 

Another thought on top of yours, if his car has a fan switch or PCM tuning, even with a 180 degree stat, he can still run dead on right around those temps. Mine does with a stock stat and PCM tuning.

 

Yes that´s what i´ve heard some people say, and I am going to get a PCM tune and thinking about getting a 160 thermo. but I don´t know what´s in it right now.
And I can tell you, I don´t have a fan switch and no tune yet. So it´s possible that I have a 160 thermo. now? If I put it out and just look at it, can I see from there if it´s a 160 or 180? Is it marked anywhere?

 

There will be a marking somewhere on the thermostat. The thermostat begins to open at it's rated temperature. 15°-20° warmer than the rated temp is common for a running temp (unless ambient temp is pretty cold).

 

Alright, it sounds pretty much like I have a 160 =)

 

So I just went out in the garage to check, and it was a 180*. But I just drove tha car in september and october before winter this year and at this time here in Sweden it starts to get colder so thats why it was about 180-185*.